Testing Guzzle cURL Mult Handler with Promises

php-guzzle-curl-promise-test.php

<?php
/**
 * We are using Guzzle v6.
 * composer require "guzzlehttp/guzzle=~6.0"
 */

//Load composer.
require __DIR__ . '/vendor/autoload.php';

//Use statements.
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Response;
use function GuzzleHttp\Promise\unwrap;

//Start the clock.
$start = microtime(true);

//Create the Guzzle client.
$client = new Client([
    'base_uri' => 'https://httpstat.us/',
    'headers' => [
        'Accept' => 'text/plain'
    ]
]);

//Create async requests.
$p1 = $client->getAsync('/200?sleep=5000');
$p1->then(function ($value) {
    /** @var Response $value */
    echo $value->getBody()->getContents() . PHP_EOL;
    flush();
});

$p2 = $client->getAsync('/201?sleep=2500');
$p2->then(function ($value) {
    /** @var Response $value */
    echo $value->getBody()->getContents() . PHP_EOL;
    flush();
});

//Send async requests.
try {
    unwrap([$p1, $p2]);
} catch (\Throwable $e) {

}

//End clock time.
$end = microtime(true);
$total = ceil($end - $start);
echo "Execution time of script = {$total} sec" . PHP_EOL;

/*
Sample response.

201 Created
200 OK
Execution time of script = 7 sec
*/